The boiling point of water is lower when atmospheric pressure decreases. Theoretically, then, you could attach a suction pump to a pot and suck out the air above the water level, and the water would come to a boil faster, thereby saving energy. Do you see anything wrong with this argument?
2006-12-04 10:18:22 · 3 answers · asked by Chris H 2 in Science & Mathematics ➔ Other - Science
At some point the water is no longer hot enough to cook the food. Everest climbers sometimes cook their food in pressure cookers to boost the atmospheric pressure, this allows the water to get hot enough to cook their food.
2006-12-04 10:26:52 · answer #1 · answered by Anonymous · 0⤊ 0⤋
As confused pointed out, under low pressures the heat would not cook the food. It would still be raw hours later. Way back in a science class I had we put some water into a test tube and put it under a partial vacuum. The water would boil from the heat in your hand when you held it. I don't think this would cook any food.
2006-12-04 23:33:05 · answer #2 · answered by wires 7 · 0⤊ 0⤋
You're still using energy to suck the air out, it's just your own energy.
2006-12-04 18:27:23 · answer #3 · answered by romulusnr 5 · 0⤊ 1⤋